Winding-up mechanism for rotary air-pumps



(No Model.) l 2 sheets-sheet 1.

l C. F. HOVEY. WNDING UP MEGHANISM- POR ROTARY. AIR PUMPS.` No. 355,018.

Patented Dec. 28, 1886'.

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-(N`o Model.) 2 Sheets-#Sheet 2.

G. P. HOYVEY. WIND'ING UP MBGHANISM FUR' ROTARY AIR. PUMPS.

Patented 1366,28, 1886.

ATTORNEYS l l A w W//WM w w SWE@ Y 0 m m WIM/58858:

UNITED ySTATES PATENT Grinch.

CHARLES HOVEY, AOF SPRINGFIELD, MASSACHUSETTS.

WINDING-UP MECHANISM FOR ROTARY AIR-PUMPS.

SPECIFICATION forming part of Letters Patent No. 355,018, dated December 28, 1886.

Application filed May 17, 1886.

To all whom it may concern:

Beit knowny that I, OHARLEs F. HovEY, a citizen of the United States, residing at Springeld, in the county of I Iampden and State of Massachusetts, have invented new and`useful Improvements in Vindingup Mechanism for Rotary Air-Pumps, of which thefollowing is In the drawings forming part of this specifi# cation, Figure l is a perspective view of the front end of an air-forcing pump having ap# plied thereto winding-up mechanism embodying my invention. Fig. 2 is a side elevation of that part of the shaft of the air-pump projecting beyond the front end of the latter,and showing thereon, in section, thewinding-drum and its pawl-and-ratchet devices, a portion of the shaft-supporting stand, and the gear and crank mechanism. Fig. 3 is an elevation of the rear end of the winding-drum, showing the air-pump shaft in section and the ratchet` and-pawl devices on the latter and on the end of said drum. Fig. 4 is a perspective view of a detail part, hereinafter fully described.

The pump 2 consists, substantially, of a machine embodying the well-known construction.

of awet gas-meter, supported on suitable legs, 3, and having the axial shaft 4 of -its interna-l revolving drum projecting sufficiently through and beyond the end of the pump to provide for placing thereon the winding-drum 5, having a circular fiange or head at each end, as

Said winding-drum has on its frontv shown. end a sleeve-extension, 6, passing between the supporting-stand 7, in which it has a bearing, and the shaft 4; and the -arm 8 is rigidly secured on said sleeve-extension at its end, as

shown' in Fig. 2. The said arm 8 is provided Serial No. 202,393. (No model.)

cured on said khollow hub 11 by a pin, 13, as shown-in Fig. 2. A pinion, 14, is secured rigidly on the outer end ofA shaft 4 and engages with said pinion 10. Shaft 4 has a ratchet`-` wheel, 15, secured thereon at the rear-end of.

the winding-drum 5, and on said rear end of the latter are pivoted two pawls, 16, each of which has a pin, 17, projecting 'from its side, which pawls engage with said ratchetwheel l5.

A circular pawl-switch, 27,Fig. 4, is attached to the rear end of the windingdrum, in the position shown, by two screws passing through circular slots therein into the end of 'said drum, whereby said switch is permitted to have a reciprocating rotary motion on the end of the latter by grasping one or both of the handles 18 shown on the border of said V switch 27, extend toward'the ratchet-wheel 15,

` outside of the free ends of the pawls 16, and the edges of said cams'are thus brought opposite to the pins 17 on the pawls, and areby the rotary motion. of said switch, capable of be# ing moved against and from said pins, to lift the pawls away from or to dropthem against the ratchet-wheel, for the purpose hereinafter set forth. A spring, 20, is secured in `the switch 27 over each pawl, to bear on" the latter and insure its proper engagement with the ratchet-wheel when permitted to do so by the cam 19. A cord, 21, has one end attached to the winding-drum 5 and passesover pulleys, as shown, and a weight, 22, is attached to the other end of said cord, whereby rotary motion in one direction is given to said drum, and through the latter to the shaft 4 and to the said `internal revolving drum of the airpump 2.

The object of the aforesaid peculiarly-constructed mechanism, to operate, as hereinafter described, between the winding-up drum 5 and the air-pump shaft 4, is Ato provide improved means whereby the machine may be Wound up, as it is termed, while the pump is operating to force air through carbureting devicesy and thence to lighted gas-burners, withontdisturbing the burning fiame by any essential variation of the pressure under which the gas is supplied to said burners by the airpump; or, in other words, to provide improved means for causing the continued rotation of the air-pump cylinder by the action of the winding-up devices, while the action of the weight which rotates said cylinder ceases.

The operation of my improvements is as follows7 it being understood that in practice suitable inlet and outlet connections are made with the pump 2, whereby air is, by the revo'- lutions of its said internal drum, drawn into and forced out of the latter and conducted through a carbureting-chamber and thence by pipes to the burners, as aforesaid.

Fig. 1 illustrates the position of the winding-up parts of the machine while drum 5 and shaft 4 are in a condition to be acted upon by the weight 22 and cord 21, as above described, whereby they are rotated, excepting that crank 12 and the pinion 10 are removed from stud 9 when drum 5 is so acted upon, for the purpose hereinafter stated. Fig. 3 illustrates the po sition ,of the pawl-switch and pawls during the rotation of said drum and shaft.

In machines of this class the internal drum of the air-pump revolves only at a speed proportionate to the flow of carbu reted ai r through the openings at said gas burners, a certain degree of pressure being thereby maintained in the pipes which supply the latter. supposing that the weight attached to the cord 21 hasA nearly run down while the gas-machine with which the pump is connected is supplying gas to burners, the cord 2l is rewound on the drum 5, and said weight is lifted by turning the crank 12, and through the 'latter the pinion 10, to which it is connected, and thereby the pinion 14 and shaft 4, on which it is secured, are likewise rotated; but shaft 4 is held back more or less because of the back-pressure in the gassupply pipes above referred to, against which the pump-drum (with which said shaft is connected) must rotate, and said resistance to rotation in shaft 4 causes the arm 8 and pinion 10 (while crank l2 is'turned) to swing around pinion 14, carrying the winding-up dru'm 5 with it and thereby winding cord 21 onto the drum. The pinion 10 under said winding-up operation so acts with regard to pinion 14 that it travels around the latter, and meanwhile said pinion and shaft 4 are free to rotate as fast as the escaping aii` from the pump will permit, and therefore the supply of air to the gas-machine is steady while the pump is beingl wound up, andthe lighted burners are not interfered with. After the machine'has been wound up the crank and the pinion 10, thereto attached, are removed from stud 9, to allow Shaft 4 and drum 5 a free rotary movement.-

The pawl-switch 27 is applied to the end of the drum 5, in order to provide means for disconnecting the pawls from the ratchet-wheel on shaft 4, when it is found desirable to allow said drum to rotate freely on said shaft for 1e pairs of cord 21 or other reasons, the pawls being so disconnected by turning said switch as far, or nearly so, as permitted by the length of its said circular slots, thereby bringingthe cams 19 against the pins 17 and lifting up the pawls. When the said switch is turned in the opposite direction, said cams are carried away from the pins on the pawls, and springs 20 ,carry the latteragain against the ratchet-wheel 15. t

What` I claim as my invention is 1. In combination, the shaft 4, having a pinion fixed thereon, a winding-up'drum capable of being rotated on said shaft and having a ratchet-andpawlconnection with the latter, substantially as described, a cord attached to 'said winding-up drum having a weight on one end, an arm fixed on said drum, and a pinion hung on said arm hav-ing a crank attached thereto and engaging with the pinion on said shaft, substantially as set forth..

2. In combination, the shaft/4, the ratchetwheel15, fixed on thelatter, the winding-up drum 5, capable of being rotated on said shaft,

one or more pawls pivoted onfsaid drum and engaging with said ratchet-wh eel, and the pawlswitch 27, capable of a reciprocating rotary motion on the end of said drum and having the cams 19 thereon for engagement with said pawls, and' provided with springs to bear on Ithe'latter, substantially as set forth.

CHARLES F.- HovEY.

Witnesses:

H. A. CHAPIN, G. M. GHAMBERLAIN.y 

